Owner's Manual
Page 2
Call 1-800-468-1502 for the most common system We are here to the store. 69-2210EF-03 ii It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to match your heating/cooling system - Installation is preset for wiring assistance before returning the thermostat to help.
Call 1-800-468-1502 for the most common system We are here to the store. 69-2210EF-03 ii It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to match your heating/cooling system - Installation is preset for wiring assistance before returning the thermostat to help.
Owner's Manual
Page 4
If so, see back cover for proper disposal instructions. Leave wallplate in place Is there a sealed tube containing mercury? Old thermostat Cover 69-2210EF-03 2 M28099 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
If so, see back cover for proper disposal instructions. Leave wallplate in place Is there a sealed tube containing mercury? Old thermostat Cover 69-2210EF-03 2 M28099 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
Owner's Manual
Page 15
SETUP WIRING ASSISTANCE M28348 Press s or t to next function. 13 69-2210EF-03 TROUBLESHOOTING RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). M28349 Press NEXT to advance to change settings. Function 1 Setting 0 Done Next Press DONE to exit and save settings.
SETUP WIRING ASSISTANCE M28348 Press s or t to next function. 13 69-2210EF-03 TROUBLESHOOTING RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). M28349 Press NEXT to advance to change settings. Function 1 Setting 0 Done Next Press DONE to exit and save settings.
Owner's Manual
Page 16
... 14 TROUBLESHOOTING SETUP Advanced Installation Guide Function 1: System type Press the s or t button to select the type of system you have in your home: 10 WIRING ASSISTANCE Done Next M28350 0 Heating & cooling: Gas, oil or electric heating with central air conditioning. 1 Heat pump: Outside compressor provides both heating and cooling. 2 Heating... or electric heating without central air conditioning. (Use this setting if you could turn the fan on and off with a fan switch on your old thermostat.) Press to display next function.
... 14 TROUBLESHOOTING SETUP Advanced Installation Guide Function 1: System type Press the s or t button to select the type of system you have in your home: 10 WIRING ASSISTANCE Done Next M28350 0 Heating & cooling: Gas, oil or electric heating with central air conditioning. 1 Heat pump: Outside compressor provides both heating and cooling. 2 Heating... or electric heating without central air conditioning. (Use this setting if you could turn the fan on and off with a fan switch on your old thermostat.) Press to display next function.
Owner's Manual
Page 18
ASSISTANCE TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. SETUP WIRING Advanced Installation Guide Function 3: Heating fan control Press the s or t button to select your heating system and fan operation: NOTE: If Function 3 does not appear, ... setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation). M28351 69-2210EF-03 16
ASSISTANCE TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. SETUP WIRING Advanced Installation Guide Function 3: Heating fan control Press the s or t button to select your heating system and fan operation: NOTE: If Function 3 does not appear, ... setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation). M28351 69-2210EF-03 16
Owner's Manual
Page 23
Do not connect both R and Rc terminals, remove metal jumper (see notes, below). Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see page 6). Wrap B wire with electrical tape. 21 69-2210EF-03 RTH6400 Wiring If labels do not use C, X or B. Connect O wire to both O and B if you have a heat pump. SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to O/B W. Do not use .
Do not connect both R and Rc terminals, remove metal jumper (see notes, below). Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see page 6). Wrap B wire with electrical tape. 21 69-2210EF-03 RTH6400 Wiring If labels do not use C, X or B. Connect O wire to both O and B if you have a heat pump. SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to O/B W. Do not use .
Owner's Manual
Page 24
... and cooling settings do not temperatures are correctly installed (see page 14). Display is set to 37°C). ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your to Cool heating and cooling equipment (see page 7). Most problems can be corrected quickly and... change ranges: • Heat: 40° to 90°F (4.5° to 32°C). • Cool: 50° to 99°F (10° to match your thermostat, please try the following suggestions.
... and cooling settings do not temperatures are correctly installed (see page 14). Display is set to 37°C). ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your to Cool heating and cooling equipment (see page 7). Most problems can be corrected quickly and... change ranges: • Heat: 40° to 90°F (4.5° to 32°C). • Cool: 50° to 99°F (10° to match your thermostat, please try the following suggestions.
Owner's Manual
Page 26
... Heating • Check Function 1: System Type to and cooling equipment running in make sure it is running at the make sure turn off) bare wires are not touching each other (see page 14). Heating system• Check Function 1: System Type to is set to make sure it is set... to match your cool mode heating and cooling equipment (see page 14). same time (or • Grasp and pull thermostat away heat does not from wallplate. WIRING ASSISTANCE TROUBLESHOOTING 69-2210EF-03 24 Check to match your heating and cooling equipment (see page 6).
... Heating • Check Function 1: System Type to and cooling equipment running in make sure it is running at the make sure turn off) bare wires are not touching each other (see page 14). Heating system• Check Function 1: System Type to is set to make sure it is set... to match your cool mode heating and cooling equipment (see page 14). same time (or • Grasp and pull thermostat away heat does not from wallplate. WIRING ASSISTANCE TROUBLESHOOTING 69-2210EF-03 24 Check to match your heating and cooling equipment (see page 6).
Owner's Manual
Page 27
...To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Battery holder Part No. 50007072-001 Cover plate assembly Part No. 50002883-001 *Use to cover marks left by old thermostats. To save time,... please remove the battery holder and note your model number and date code before calling. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 For assistance with this product, please visit http://DIYthermostats.honeywell.com or call Honeywell Customer Care toll-free at...
...To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Battery holder Part No. 50007072-001 Cover plate assembly Part No. 50002883-001 *Use to cover marks left by old thermostats. To save time,... please remove the battery holder and note your model number and date code before calling. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 For assistance with this product, please visit http://DIYthermostats.honeywell.com or call Honeywell Customer Care toll-free at...